Represents a notification emitted by the MBean Server through the MBeanServerDelegate MBean.
The MBean Server emits the following types of notifications: MBean registration, MBean
unregistration.

To receive MBeanServerNotifications, you need to register a listener with
the MBeanServerDelegate MBean
that represents the MBeanServer. The ObjectName of the MBeanServerDelegate is
MBeanServerDelegate.DELEGATE_NAME, which is
JMImplementation:type=MBeanServerDelegate.

The following code prints a message every time an MBean is registered
or unregistered in the MBean Server mbeanServer: